.page-faq {
  --faq-gap: clamp(20px, 3vw, 34px);
  --faq-sect: clamp(44px, 7vw, 84px);
  --faq-pad: clamp(16px, 2.4vw, 24px);
  --faq-line: 1px solid var(--hair);
}

/* ===== 首屏 ===== */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(22px, 4vw, 48px) 0 clamp(26px, 4vw, 44px);
  border-bottom: var(--faq-line);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  z-index: 0;
  top: -170px;
  left: -90px;
  width: min(600px, 84vw);
  height: 420px;
  background: radial-gradient(closest-side, rgba(43, 224, 184, .14), rgba(43, 224, 184, 0) 72%);
  pointer-events: none;
}

.page-faq .faq-hero > .wrap {
  position: relative;
  z-index: 1;
}

.page-faq .crumbs {
  margin-bottom: 16px;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: var(--faq-gap);
  margin-top: 14px;
}

.page-faq .faq-hero__title {
  margin: 10px 0 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.9rem, 7.2vw, 3.4rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--paper);
  max-width: 16em;
}

.page-faq .faq-hero__accent {
  color: var(--amber);
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 32em;
  font-size: 17px;
  line-height: 1.9;
  color: var(--paper);
}

.page-faq .faq-hero__index-title {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-index {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--hair);
  border: var(--faq-line);
}

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  min-height: 54px;
  padding: 13px 14px;
  background: var(--ink-800);
  color: var(--paper);
  text-decoration: none;
  font-size: 15px;
  transition: background .2s ease, box-shadow .2s ease;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: var(--ink-700);
  box-shadow: inset 3px 0 0 var(--amber);
  outline: none;
}

.page-faq .faq-index__num {
  font-size: 12px;
  color: var(--muted);
}

.page-faq .faq-index__text {
  min-width: 0;
}

.page-faq .faq-index__hint {
  display: none;
  font-size: 12px;
  color: var(--muted);
}

.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: var(--faq-gap) 0 0;
  background: var(--hair);
  border: var(--faq-line);
}

.page-faq .faq-stats__item {
  padding: 14px 16px;
  background: rgba(14, 22, 32, .7);
}

.page-faq .faq-stats dt {
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--muted);
  margin-bottom: 6px;
}

.page-faq .faq-stats dd {
  margin: 0;
  font-size: 17px;
  color: var(--paper);
}

.page-faq .faq-stats__num {
  font-size: 22px;
  color: var(--gold);
  margin-right: 4px;
}

/* ===== 通用章节 ===== */
.page-faq .faq-section {
  position: relative;
  padding: var(--faq-sect) 0;
  border-bottom: var(--faq-line);
  overflow: hidden;
}

.page-faq .faq-section__head {
  position: relative;
  margin-bottom: clamp(22px, 3vw, 36px);
  max-width: 46em;
}

.page-faq .faq-section__idx {
  position: absolute;
  top: -0.42em;
  right: -0.05em;
  font-size: clamp(2.6rem, 8vw, 5.2rem);
  font-weight: 700;
  line-height: 1;
  color: rgba(232, 241, 240, .06);
  pointer-events: none;
  user-select: none;
}

.page-faq .faq-section__title {
  margin: 8px 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 4.4vw, 2.3rem);
  line-height: 1.12;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-faq .faq-section__lead {
  margin: 0;
  font-size: 17px;
  line-height: 1.9;
  color: var(--muted);
}

/* ===== 01 筛选层级 ===== */
.page-faq .faq-layer-grid {
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .legend {
  margin-bottom: 16px;
}

.page-faq .faq-layer-main__text {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--paper);
  max-width: 34em;
}

.page-faq .faq-layers {
  display: grid;
  gap: 8px;
  margin-bottom: 18px;
}

.page-faq .faq-layer {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
  padding: 12px 14px;
  border: var(--faq-line);
  border-left: 3px solid var(--layer-c, var(--hair-strong));
  background: var(--ink-800);
}

.page-faq .faq-layer:nth-child(2) {
  margin-left: 12px;
}

.page-faq .faq-layer:nth-child(3) {
  margin-left: 24px;
}

.page-faq .faq-layer:nth-child(4) {
  margin-left: 36px;
}

.page-faq .faq-layer--home {
  --layer-c: var(--home);
}

.page-faq .faq-layer--away {
  --layer-c: var(--away);
}

.page-faq .faq-layer__label {
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--muted);
}

.page-faq .faq-layer__name {
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-layer__note {
  font-size: 13px;
  color: var(--muted);
}

.page-faq .faq-layer-main__tip {
  margin: 0;
  padding: 14px 16px;
  border: var(--faq-line);
  border-left: 3px solid var(--cyan);
  background: rgba(13, 59, 46, .45);
  font-size: 14px;
  line-height: 1.85;
  color: var(--paper);
}

.page-faq .faq-figure {
  margin: 0;
  border: var(--faq-line);
  background: var(--ink-700);
  overflow: hidden;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-figure--phone {
  align-self: start;
}

.page-faq .faq-figure__caption {
  padding: 10px 14px;
  border-top: var(--faq-line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ===== 02 三步路径 ===== */
.page-faq .faq-steps {
  position: relative;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-faq .faq-steps__input,
.page-faq .faq-device__input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-faq .faq-steps__bar {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.page-faq .faq-steps__item {
  display: block;
}

.page-faq .faq-steps__item + .faq-steps__item::before {
  content: "↓";
  display: block;
  margin: 6px 0;
  text-align: center;
  font-family: var(--font-mono);
  color: var(--muted);
}

.page-faq .faq-steps__node {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 56px;
  padding: 14px 16px;
  border: var(--faq-line);
  background: var(--ink-800);
  color: var(--muted);
  font-size: 15px;
  cursor: pointer;
  transition: background .2s ease, color .2s ease, border-color .2s ease, transform .2s ease;
}

.page-faq .faq-steps__node:hover {
  transform: translateY(-2px);
}

.page-faq .faq-steps__name {
  font-weight: 700;
}

.page-faq .faq-stepno {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-faq #faq-step-1:checked ~ .faq-steps__bar .faq-steps__node--1,
.page-faq #faq-step-2:checked ~ .faq-steps__bar .faq-steps__node--2,
.page-faq #faq-step-3:checked ~ .faq-steps__bar .faq-steps__node--3 {
  border-color: var(--hair-amber);
  background: rgba(255, 138, 61, .1);
  color: var(--paper);
}

.page-faq #faq-step-1:checked ~ .faq-steps__bar .faq-steps__node--1 .faq-stepno,
.page-faq #faq-step-2:checked ~ .faq-steps__bar .faq-steps__node--2 .faq-stepno,
.page-faq #faq-step-3:checked ~ .faq-steps__bar .faq-steps__node--3 .faq-stepno {
  color: var(--amber);
}

.page-faq #faq-step-1:focus-visible ~ .faq-steps__bar .faq-steps__node--1,
.page-faq #faq-step-2:focus-visible ~ .faq-steps__bar .faq-steps__node--2,
.page-faq #faq-step-3:focus-visible ~ .faq-steps__bar .faq-steps__node--3 {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .faq-steps__panel {
  display: none;
  padding: var(--faq-pad);
  border: var(--faq-line);
  border-top: 2px solid var(--amber);
  background: var(--ink-700);
}

.page-faq #faq-step-1:checked ~ .faq-steps__panels .faq-steps__panel--1,
.page-faq #faq-step-2:checked ~ .faq-steps__panels .faq-steps__panel--2,
.page-faq #faq-step-3:checked ~ .faq-steps__panels .faq-steps__panel--3 {
  display: block;
}

.page-faq .faq-steps__panel-lead {
  margin: 0 0 10px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--paper);
  max-width: 34em;
}

.page-faq .faq-steps__panel-result {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--away);
}

.page-faq .faq-steps__note {
  margin: 14px 0 0;
  padding-left: 14px;
  border-left: 3px solid var(--wine);
  font-size: 13px;
  line-height: 1.85;
  color: var(--muted);
}

/* ===== 03 折叠排查 ===== */
.page-faq .faq-acc {
  display: grid;
  gap: 10px;
}

.page-faq .faq-acc__item {
  position: relative;
  border: var(--faq-line);
  background: rgba(20, 32, 43, .55);
}

.page-faq .faq-acc__item[open] {
  border-color: var(--hair-amber);
  background: var(--ink-700);
}

.page-faq .faq-acc__item[open]::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: var(--amber);
}

.page-faq .faq-acc__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  min-height: 60px;
  padding: 16px 16px 16px 20px;
  list-style: none;
  cursor: pointer;
}

.page-faq .faq-acc__head::-webkit-details-marker {
  display: none;
}

.page-faq .faq-acc__head:hover .faq-acc__title {
  color: var(--cyan);
}

.page-faq .faq-acc__letter {
  font-size: 12px;
  color: var(--gold);
}

.page-faq .faq-acc__title {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
  transition: color .2s ease;
}

.page-faq .faq-acc__mark {
  position: relative;
  width: 12px;
  height: 12px;
  flex: none;
}

.page-faq .faq-acc__mark::before,
.page-faq .faq-acc__mark::after {
  content: "";
  position: absolute;
  background: var(--cyan);
}

.page-faq .faq-acc__mark::before {
  top: 5px;
  left: 0;
  width: 12px;
  height: 2px;
}

.page-faq .faq-acc__mark::after {
  top: 0;
  left: 5px;
  width: 2px;
  height: 12px;
  transition: transform .2s ease;
}

.page-faq .faq-acc__item[open] .faq-acc__mark::after {
  transform: scaleY(0);
}

.page-faq .faq-acc__body {
  padding: 0 20px 20px;
}

.page-faq .faq-acc__lead {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-steps-list {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-steps-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper);
}

.page-faq .faq-steps-list .faq-stepno {
  padding-top: 4px;
  color: var(--muted);
}

.page-faq .faq-acc__result {
  margin: 0;
  padding: 10px 14px;
  border-left: 3px solid var(--teal);
  background: rgba(13, 59, 46, .5);
  font-size: 14px;
  line-height: 1.8;
  color: var(--paper);
}

.page-faq .faq-inline-link {
  color: var(--cyan);
  text-decoration: underline;
  text-decoration-color: var(--hair-cyan);
  text-underline-offset: 3px;
}

.page-faq .faq-inline-link:hover {
  color: var(--gold);
}

/* ===== 04 设备切换 ===== */
.page-faq .faq-device {
  position: relative;
}

.page-faq .faq-device__tabs {
  display: inline-flex;
  gap: 3px;
  padding: 3px;
  border: var(--faq-line);
  background: var(--ink-800);
  margin-bottom: 20px;
}

.page-faq .faq-device__tab {
  padding: 9px 20px;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--muted);
  cursor: pointer;
  transition: background .2s ease, color .2s ease;
}

.page-faq #faq-dev-phone:checked ~ .faq-device__tabs .faq-device__tab--phone,
.page-faq #faq-dev-tablet:checked ~ .faq-device__tabs .faq-device__tab--tablet {
  background: var(--ink-700);
  color: var(--paper);
  box-shadow: inset 0 0 0 1px var(--hair-cyan);
}

.page-faq #faq-dev-phone:focus-visible ~ .faq-device__tabs .faq-device__tab--phone,
.page-faq #faq-dev-tablet:focus-visible ~ .faq-device__tabs .faq-device__tab--tablet {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .faq-device__panel--phone {
  display: block;
}

.page-faq .faq-device__panel--tablet {
  display: none;
}

.page-faq #faq-dev-phone:checked ~ .faq-device__panels .faq-device__panel--tablet {
  display: none;
}

.page-faq #faq-dev-tablet:checked ~ .faq-device__panels .faq-device__panel--phone {
  display: none;
}

.page-faq #faq-dev-tablet:checked ~ .faq-device__panels .faq-device__panel--tablet {
  display: block;
}

.page-faq .faq-check {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--hair);
  border: var(--faq-line);
}

.page-faq .faq-check > li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 16px;
  background: var(--ink-800);
}

.page-faq .faq-check__no {
  font-size: 12px;
  color: var(--cyan);
  padding-top: 3px;
}

.page-faq .faq-check__title {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-check__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-device__foot {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

/* ===== 05 兜底交接 ===== */
.page-faq .faq-section--handoff {
  border-bottom: none;
  background:
    linear-gradient(120deg, rgba(62, 46, 107, .5) 0%, rgba(62, 46, 107, 0) 58%),
    linear-gradient(300deg, rgba(122, 59, 90, .35) 0%, rgba(122, 59, 90, 0) 52%);
}

.page-faq .faq-handoff {
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .faq-handoff__title {
  margin: 8px 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 4.4vw, 2.3rem);
  line-height: 1.12;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-faq .faq-handoff__text {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--paper);
  max-width: 34em;
}

.page-faq .faq-handoff__list {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 1px;
  background: rgba(143, 163, 168, .16);
  border: var(--faq-line);
}

.page-faq .faq-handoff__list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  padding: 13px 16px;
  background: rgba(7, 11, 18, .72);
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper);
}

.page-faq .faq-handoff__no {
  font-size: 12px;
  color: var(--gold);
  padding-top: 3px;
}

.page-faq .faq-handoff__cta {
  display: inline-block;
}

.page-faq .faq-handoff__aside {
  padding: var(--faq-pad);
  border: var(--faq-line);
  background: rgba(14, 22, 32, .72);
}

.page-faq .faq-handoff__aside-title {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-handoff__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--hair);
}

.page-faq .faq-handoff__link {
  display: block;
  padding: 14px 12px;
  background: var(--ink-800);
  color: var(--paper);
  text-decoration: none;
  font-size: 15px;
  transition: background .2s ease, color .2s ease;
}

.page-faq .faq-handoff__link:hover,
.page-faq .faq-handoff__link:focus-visible {
  background: var(--ink-700);
  color: var(--cyan);
  outline: none;
}

/* ===== 响应式 ===== */
@media (min-width: 640px) {
  .page-faq .faq-index__link {
    grid-template-columns: auto minmax(0, 1fr) auto;
  }

  .page-faq .faq-index__hint {
    display: block;
  }

  .page-faq .faq-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-faq .faq-steps__bar {
    flex-direction: row;
    align-items: stretch;
    margin-bottom: 22px;
  }

  .page-faq .faq-steps__item {
    flex: 1 1 0;
    position: relative;
  }

  .page-faq .faq-steps__item + .faq-steps__item::before {
    content: "→";
    position: absolute;
    left: -11px;
    top: 50%;
    margin: 0;
    transform: translateY(-50%);
    font-size: 14px;
    line-height: 1;
  }

  .page-faq .faq-steps__node {
    height: 100%;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    align-items: start;
    gap: clamp(32px, 4vw, 56px);
  }

  .page-faq .faq-layer-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 360px);
    align-items: start;
  }

  .page-faq .faq-handoff {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr);
    align-items: start;
    gap: clamp(28px, 3.5vw, 48px);
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-acc__body {
    padding: 0 28px 24px 84px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .faq-steps__node,
  .page-faq .faq-acc__mark::after,
  .page-faq .faq-acc__title,
  .page-faq .faq-device__tab,
  .page-faq .faq-handoff__link {
    transition: none;
  }

  .page-faq .faq-steps__node:hover {
    transform: none;
  }
}